gistfile1.txt

function changecss(myclass,element,value) {
    var CSSRules;
    if (document.all) {
        CSSRules = 'rules'
    }
    else if (document.getElementById) {
        CSSRules = 'cssRules'
    }
    for (var i = 0; i < document.styleSheets[0][CSSRules].length; i++) {
        if (document.styleSheets[0][CSSRules][i].selectorText == myclass) {
            document.styleSheets[0][CSSRules][i].style[element] = value;
            console.warn(myclass + " : " + element + " => " + value + " ok");
        }
        else
            console.warn("css: " + myclass + " NOT FOUND!");
    }  
}